RIP Stephanie Kwolek

As one of the few pioneering female chemists in the 1960s, Stephanie Kwolek invented the flexible, tougher than steel fibers that were used to create life-saving body armor for law enforcement and soldiers.
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"She leaves a wonderful legacy of thousands of lives saved and countless injuries prevented by products made possible by her discovery," DuPont CEO Ellen Kullman said in a statement.
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In 1965, Kwolek devised a liquid crystal solution that could be cold-spun. Nearly half a century later, her discovery and legacy have endured through a variety of goods ranging from bulletproof vests to sports rackets and smartphones.

Earlier this week, the one millionth vest using the latest Kevlar technology was sold, according to DuPont, showing just how important Kwolek's discovery remains, even half a century after she did what researchers had long struggled to do.
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